Question

Pătratul ABCD ,AC=8.Aflați AB

Answer 1

$AC = d = 8 \: cm$

$d = l \sqrt{2} = AB \sqrt{2}$

$AB \sqrt{2} = 8$

$AB = \frac{8}{ \sqrt{2} }$

$AB = \frac{8 \sqrt{2} }{2}$

$AB = 4 \sqrt{2} \: cm$

Answer 2

Pitagora

AC² = AB² + BC² si AB = BC

AC² = 2AB²

64 = 2AB²

AB = √64/2

AB = 8/√2 

AB = 4√2 cm